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  1. #1

    Default Power drain- Tahoe 2003

    Hi - I have a power drain when the truck is on or off. I can watch the volt gage and see it drop to under 12volts. I was wondering if it might be the coils or something like that. Does anyone have some ideas on this........Thanks, Eric

  2. #2

    Default

    Best way to test is start truck and carefully turn each accessory on and off and see its affect of the voltmeter. Also test the voltage at the battery while running it should be about 14.4. Does it happen with any other weird thing going on with the truck? How old is the alt, battery, and are you using factory cables and what electrical mods do you have. Also just run the truck with 0 accessories on and see if it happens just sitting no driving, maybe reving a bit.

    1996 Chevy Tahoe LT 5.7L V8 4X4 205,000+ miles. Built proudly at Janesville Assembly in Janesville, Wisconsin
    Basic mods: Lights all over, bunch of electrical work, and a couple cooling mods.

    Check out my other mods in My Garage: http://www.gmtruckclub.com/forum/sho...t-Tahoe-4-Door

  3. #3

    Default

    Eric, follow @Conlan Rose 's advice and you should find the problem. If your dash gauge is reading correctly, that is a large drain, I would suspect the alternator, or the battery.
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  4. #4

    Default

    I did all that and then I took it to my mechanic he hooked up this charging unit and I shut the truck down took the keys out and he said there was still a power drain. HE said it was a short. The battery is new and he sold it to me in Dec. (was supposed to be around 800CA but this one was650CA) cost me about $150 and I still have to get the right one latter, and I will keep this one for my second one. Anyway He said to drop of the truck and he would try to chase down the short but could take longer than a day. I don't completely trust him so if anyone might have any ideas. Thanks Eric

  5. #5

    Default

    Any load that is draining the battery that fast should not be hard to located. Try pulling fuses while the meter is monitoring the battery (I would monitor current, but you may be more comfortable monitoring the voltage). You don't need the key "on" if it's draining all of the time.

  6. #6

    Default

    Quote Originally Posted by RayVoy View Post
    Any load that is draining the battery that fast should not be hard to located. Try pulling fuses while the meter is monitoring the battery (I would monitor current, but you may be more comfortable monitoring the voltage). You don't need the key "on" if it's draining all of the time.
    I did this and no luck. I pulled all fuses one at at a time and the volt metter stayed at 12 volts.Thanks Eric

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